Unfortunately, there is an error in the prompt. Big Lagoon State Park is actually located in Florida, not Tennessee. Here is a summary of Big Lagoon State Park in Florida:

Big Lagoon State Park is a popular destination for outdoor enthusiasts in Florida. The park is located on the Gulf Coast near Pensacola and covers over 700 acres of land and water. There are many good reasons to visit the park, including its beautiful beaches, diverse wildlife, and recreational activities.

One of the main attractions of Big Lagoon State Park is its namesake lagoon, which provides a habitat for a variety of aquatic animals. Visitors can explore the lagoon by canoe or kayak, or by taking a guided tour. The park also has a number of hiking and biking trails, which offer great opportunities to see the park's wildlife and natural scenery.

Other points of interest in the park include the fishing pier, picnic areas, and the campground. The park also has a visitor center, which offers exhibits and educational programs about the park's ecosystems and wildlife.

Interesting facts about the park include that it is home to a number of endangered species, including the Gulf sturgeon and the snowy plover. The park was also once used as a training ground for the Army during World War II.

The best time of year to visit Big Lagoon State Park depends on what activities you want to do. The park is open year-round, but summers can be hot and crowded. Spring and fall are good times to visit for hiking and wildlife viewing, while winter is a good time for birdwatching and fishing.